package com.itheima.utils;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.auth.CredentialsProvider;
import com.aliyun.oss.common.auth.DefaultCredentialProvider;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.UUID;

/**
 * 阿里云 OSS 工具类
 */
@Component
public class AliOSSUtils {

//    private String endpoint;
//    private String accessKeyId;
//    private String accessKeySecret;
//    private String bucketName;

    @Autowired
    private AliOSSProperties aliOSSProperties;

    /**
     * 实现上传图片到OSS
     */
    public String upload(MultipartFile file) throws IOException {

        // 获取阿里云OSS参数
        String endpoint = aliOSSProperties.getEndpoint();
        String accessKeyId = aliOSSProperties.getAccessKeyId();
        String accessKeySecret = aliOSSProperties.getAccessKeySecret();
        String bucketName = aliOSSProperties.getBucketName();
        String readPath = aliOSSProperties.getReadPath();

        // 使用代码嵌入的RAM用户的访问密钥配置访问凭证。
        CredentialsProvider credentialsProvider = new DefaultCredentialProvider(accessKeyId, accessKeySecret);

        // 获取上传的文件的输入流
        InputStream inputStream = file.getInputStream();

        // 避免文件覆盖
        String originalFilename = file.getOriginalFilename();
        String fileName = UUID.randomUUID().toString() + originalFilename.substring(originalFilename.lastIndexOf("."));

        //生成多层级目录,方便文件管理
        fileName = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyy/MM/dd"))+"/"+fileName;
        //上传文件到 OSS
        OSS ossClient = new OSSClientBuilder().build(endpoint,credentialsProvider);
        ossClient.putObject(bucketName, fileName, inputStream);

        //文件访问路径
//        String url = endpoint.split("//")[0] + "//" + bucketName + "." + endpoint.split("//")[1] + "/" + fileName;
        // 关闭ossClient

        ossClient.shutdown();
        return readPath+"/"+fileName;// 把上传到oss的路径返回
    }

}
